One problem related to gas recirculation valve (egr valve) has been reported for the 2004 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mazda MAZDA3 based on all problems reported for the 2004 MAZDA3.
I am very concerned about the safety of the car that I have had since 2004 Mazda 3. On Sunday, I was hit by a car at about a 20 to 30 degree angle and the impact hit my passenger door. Neither one of us was going at a speed that should have had a result in the damage that occurred. When he hit us and the car came to rest, the police and towing people discovered that the engine had snapped off its mounting. My airbags did not deploy either. He told me that both he and the towing agent had ever seen this happen before to a car with as little damage to it. I went to the tow place where they were holding my car to take pictures and look at the car, and both of the people (different people than the original tow driver) said they had never seen anything like that. The one guy said only twice has he seen that happen and both had major damage to the car and that they were demolished up to half of the car. He also said the mounting piece of hardware looked like it was made of diecast not metal or aluminum, when we inspected it we noticed the part that was snapped and I must admit it looked like plastic. I had to have the struts replaced in 2008, but yet I had never hit the tires hard on anything. My question is this something that should be investigated and could it be dangerous to other drivers of this year. I know that they have made engines that are designed to drop in accident recently, but not for this year and not for that type of accident. I have written to Mazda requesting an investigation and I await their response.